2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 181Get this manual
COOLING SYSTEM Drive in new mechanical seal using the special tool until it is fully seatedTOOL: Oil seal driver attachment 07945-KA30000 or 07965-415000A (U.S.Aonly) OIL SEAL DRIVER
Apply oil to new oil seal lip and install it until it is flush with the right crankcase cover
Drive in new water pump shaft bearing until it is fully seated using the special toolsTOOL: Driver Attachment, 28 30 mm Pilot, 12 mm 07749-0010000 07946-1870100 07746-0040200